members reach their places, bolts or pins are passed through the eyes to secure them. In England the opposite system is generally used. Bridge work is riveted in place. The great Forth bridge was to a great extent built in situ. An American bridge is built at the iron works, perhaps a thousand… … Fig. 3.-L00P, GEORGETOWN BRANCH OF THE UNION PACIFIC RAILROAD, COLORADO. the Union Pacific R.R. Two points at a direct dis- illustration of iron cantilever railway bridge construc- 177 feet high, resting on stone foundation piers. The tance of 1)4 miles, with a gradient of 480 feet per mile, tion…
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